GMC 2008 Acadia - Manual (Page 165)

Format Two: This display includes the information
in Format One without the transmission information
and the outside air temperature.
Format Three: This display includes all the information
in Format One along with a circular tachometer, but
without outside air temperature.
All formats will show the turn-by-turn navigation
information and provide details about the next driving
maneuver to be made. When you near your destination,
the HUD will display a distance bar that will fill in the
closer you get to your destination. All navigation
information is provided to the HUD by the navigation
radio, if the vehicle has one.
The HUD image displayed on the windshield will
automatically dim and brighten to compensate for
outside lighting.
The HUD image can temporarily light up depending
on the angle and position of the sunlight on the
HUD display. This is normal and will change when
the angle of the sunlight on the HUD display changes.
Polarized sunglasses could make the HUD image
harder to see.
Care of the HUD
Clean the inside of the windshield as needed to remove
any dirt or film that could reduce the sharpness or
clarity of the HUD image.
To clean the HUD lens, use a soft, clean cloth that has
household glass cleaner sprayed on it. Wipe the HUD
lens gently, then dry it. Do not spray cleaner directly on
the lens because the cleaner could leak into the unit.
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